Services · PT
Liquid penetrant testing
Revealing surface-breaking discontinuities on any non-porous material.
SR EN ISO 3452-1…6SR EN ISO 23277SR EN ISO 12706
How the method works
A coloured or fluorescent penetrant is applied to the cleaned surface and drawn into surface-breaking discontinuities by capillary action. After excess removal, a developer draws the trapped penetrant back out, forming a visible indication considerably wider than the actual defect.
What it detects
- Surface-breaking cracks
- Surface porosity and blowholes
- Laps and laminations
- Surface-breaking lack of fusion
- Through-wall leaks in thin sections
Typical applications
- Welded joints in austenitic stainless steel and aluminium
- Castings and forgings in non-ferromagnetic materials
- Pressure vessels and process piping
- Verification after machining
Reference standards
- SR EN ISO 3452-1…6
- SR EN ISO 23277
- SR EN ISO 12706
Equipment
Full details are being added.
Limitations
No method answers everything. We say up front where it stops, so we can pick the right technique for your job together.
- Detects surface-breaking defects only — internal defects remain invisible
- Not applicable to porous or highly absorbent materials
- The surface must be thoroughly degreased; oil or paint blocks penetration
- Penetration and development dwell times must be strictly observed to avoid false negatives